How can I modify the example: https://github.com/rancher/fleet-examples/blob/master/multi-cluster/kustomize/fleet.yaml so that the first 2 environment is deployed to a shared cluster? do I have to create a new Bundle? that seems just to much copy/paste for what I try to achive

Qa and stage will have the same label. Maybe testing and prod will have prod. That way the two clusters will get what ever is assigned to them on the 'testing' label